In reply to Robert Durran:
Before the horrible Adidas resizing a few years ago, the old versions had a few slight changes over the years, but towards the end the design was almost identical to the Adidas one.
The one visual difference (other than the size) between my pair I bought in 2015 (nice fit) and 2019 (bad fit) is the length of the velcro strap. In the 2015 pair both the 'sticky' and 'soft' bits of the velcro were the same length, so when fastened neatly would fold over itself fully. The 2019 pair had a shorter 'sticky' bit that left about 2cm of the soft velcro not covered when fastened neatly.
Edit: Just checked mine and Graeme's method is right, the 2019 pair have Adidas written under the QR code on the inside sizing label, but the older pair don't.
Post edited at 14:25